End cap for electric conduits.



PATENTED D30. 17, 1907 H. P. MOORE. END GAP FOR ELBGTRIG GONDUITS.

- frzaerziar: M Ma /Mm UNITED HARRY nMooaE, or NnwBUnYPonr, MASSACHUSETTS.

END CAP FOR Emac'rnrc conmms. H

I Specification of Letters Patent. Application filed'hpril 6 19 0% Serial No. 366.657. q H

Patented Dec, .17 I

To all whom it may concern:

Beit known that I, HARRY P. Moons, of

I N'ewburyport, county of Essex, State of Massachusetts, have invented an Improvementin End Caps'for ElectrictConduits, of which.

leaves or ears or equivalentportions adapted to engage the pipe atpoin'ts intermediate their length only, thereby eirtending tangenti ally from the cylindricalgsurface of the pipe in opposite ways, and not touching the pipe or its threads at the junction points of the faces of the attaching portion witheach other, thereby decreasing the frictional contact with the threads of the pipe and increasing the ease oiapplication; and also to provide said leaves or ears or equivalent portions of the polygonal attaching portion with -in wardly extended projections at their points of engagement with the pipe, which enter the spaces between the threads on the pipe, said projection-s being arranged on the inner faces of said leaves or cars with respect to each other so as to follow the threads as the end cap is-turned, to thereby move the cap along on the pipe. Also to provide the end cap with a spring acting attaching portion, which, when placed on the end of-the pipe or conduit which. projects through a hole in the wall of a junction box will yieldingly engage the wall of said box, to thereby serve as a means for hoiding the not win :h is placed on the pipe or conduit at the opposite side of said wall.

i igurc 1 shows in. side elevation a portion oi a pipe having on its end an end cap embodying this invention. Fig. 2 is an end view of the end'cape Fig. 3 is a vertical secs tion of the end cap shown in Fig. 2, taken on the dotted line 3-3. Figs. 4 and 5 are detaiis showing the leaves or ears in engageroentwith the pipe.

nal attaching portion.

The end cap 18 struckup or drawn from a "threads on the pipe, at 'oints su .portion;

Fig. 6 isa side view of. an end cap having a modified form of polygo sheet of ductile metal, and has apolygonah attaching portion with. eight orless faces-and" a rounded or finished edge surrounding the central aperture in the 'end, throughfwhich 60.

the wires extend.

My-invention resides particularly inthe construction of the polygonal. attaching por- 'tion. This portion is composed of a plurality of straight leaves or cars, eight being herein shown. They may be separated more or less, as shown in Fig. 1, or they may not be separated, as shown in Fig. 6. These leaves or cars are so arran ed as to. engage the pipe at points intermediate their length only and as shown in Figs. 4 and 5 the inner flat iaces thereof will bear directly upon tll116 'stantia y midway their length. he threads afford a firm bearing for the leaves or ears or equivalent portions, so that when engaged e'xte riorly by a wrench they may be firmly gri ped in order that the cap ma be turned wit out crushing the polygona attaching ears, when thus arranged, extend tangentially to the cylindrical surface of the 1pc in opposite ways, and the threads whic 1 they engage serve as seats to support them against belng pressed inward when engaged by the 85.

wrench and turned. The leaves or cars a, have on their faces inwardly extendedprojections a, some or all of the leaves having such projections. The ma be few in numher or many as desire are made so as to enter the s aces between the threads, to thereby hold the end cap firmly on a pipe, and as said cap is turned to follow the threads so thatv it will be moved along onthe pipe.

. The ends of the ears or leaves a are turned up as shown at a; to provide abutting 'portions which are adapted to engage'the wall 0 of a junction box, and when the-attaching portion consists of ears or leaves which are 100 conduit which projects through a hole in the 105 wall c'of a junction box the upturned ends of the ears or leaves will engage said Well, and when the nut 12 is turned up on said pipe at the opposite side of the wall (2, said'ears or leaves Wlll yield, and as a'result the end'oap 110 will serve to lock the nut or as a means for holding said-nut in place.

It will be noted that the leaves or ese projections Having thus described my invention, what I claim as new and desire to secure by Letters Patent is p 1. An end cap for electric conduits struck up or drawn from ductile sheet metal having ment, inwardly extended projections which enter the spaces between t 1 p are arranged to follow the threads as the cap e threads, which is turned, to thereby move the cap along on the pipe, substantially as described.

thre ads ou'the pipe at points inter-i an attaching portion composed of a plurality.

of spring-acting earsor leaves with upturned ends and with inwardly extended projections adapted to enter the spaces between the as described.

In testimony whereof, I have signed-m two subscribing Witnesses. V

HARRY .P. MOORE;- 1-

Witnesses: 7

B. J. NoYEs, H. B. 'DAvIs" 7-" pipe or conduit, substantially l v y'" 25 name to this specrlicatlon, 1n the presence of' 

